With regard to circumcision, one of the reasons for it is, in my opinion, the wish to bring about a decrease in sexual intercourse and a weakening of the organ in question, so that this activity be diminished and the organ be in as quiet a state as possible.

The perfection and perpetuation of this Law can only be achieved if circumcision is performed in childhood... the parents of a child that is just born take lightly matters concerning it, for up to that time the imaginative form that compels the parents to love it is not yet consolidated. For this imaginative form increases through habitual contact and grows with the growth of the child. Then it begins to decrease and to disappear, I refer to this imaginative form. For the love of the father and of the mother for the child when it has just been born is not like their love for it when it is one year old, and their love for it when it is one year old is not like their love when it is six years old. Consequently if it were left uncircumcised for two or three years, this would necessitate the abandonment of circumcision because of the father's love and affection for it. At the time of its birth, on the other hand, this imaginative form is very weak, especially as far as concerns the father upon whom this commandment is imposed. Circumcision Information and Resource Pages